2 HST.M51 ivo://mast.stsci/siap/hst.m51 doi:10.17909/T9GP4C Space Telescope Science Institute Archive Mutchler, et al 1.0 Archive Branch, STScI archive@stsci.edu Optical Astronomy In January 2005, the Hubble Heritage Team obtained a large 4-color mosaic image of the Whirlpool Galaxy NGC 5194 (M51), and its companion NGC 5195, with the Advanced Camera for Surveys (ACS) onboard the Hubble Space Telescope (HST observing program 10452, PI: Steven V. W. Beckwith). A six-pointing ACS WFC mosaic of the galaxy pair M51 was obtained in four filters: B, V, I, and H-alpha. http://archive.stsci.edu/prepds/m51/ Archive Research 2 http://archive.stsci.edu/siap/search.php?id=m51& GET Pointed 360.0 360.0 360.0 360.0 0 0 0 100 202.5 47.2 1.0 1.0 HST ACS Optical